Each pulse audio streams is an object now

src/audio/Makefile.am

src/audio/audiostream.cpp

src/audio/audiostream.h

src/audio/dtmf.cpp

src/audio/pulselayer.cpp

src/audio/pulselayer.h

src/audio/samplecache.cpp

src/audio/samplecache.h

src/global.h

src/managerimpl.cpp